Nurling-tool



A. DJIDICS.

NURLING TOOL.

APPLICATION FILED FEB. 10, x920.

1,369,792. Patented Mar. 1,1921.

4'5 2 lug has a smooth bored hole through it in i annxannnalnarnros, or NEW-roux, NriY.

' in;Rr.I1\rermoon. 1

Ta zz waomiama 00m 2 Be it known that I, ALExANnEnDJIDIos, a

citizenof Serbia residing at New, York, in

the county and State of'New York, have invented certain new and useful Improvements in Nurling-Tools, of which the following is a full, clear, and exact specificatlOIL. iThis invention relates to nurling tools, andv has for its object'to provide a tool of this kind which may besupported in the tool holder of a lathe in such a way that it may yieldto compensate for irregular movements of the work. Another object is to adapt the tool to yield for the purpose of nurling articles having flat faces, so that said fia t'face sj H as w ell as the edges between said faces may be evenly knurled without injury to the tool. 1 i

Other objects will appear as the description proceeds. i

Theinvent fined in the claims at theend tion.

similar'reference characters are used .to des ignate corresponding-parts throughout .the

several views 5- Figure 1 is a sidelel evation of a tool constructed substantially accordance with this invention and showing a fiat s ded piece '.'Fig. 3 is a of work engaged therebyl ig. 2 is acentral longitudinal section of a modified form ofthe-tool. H v plan View oftheio'rmshown in Fig. 2 i

Fig. 4 is a sectiononthe line lv Ivor Fig. 2 and Fig. '5 is a section of a modified form of jaw carrying a smooth wheel as well as a nurling wheel. I

A coupling member 1 is rigidly fastened to one jaw 2 of the tool, as by rivets 3, and has a projecting lug 4; formed thereon. Sa1d which is engaged a slightly tapered pin -5.

The ends of said pin project at opposite sides of the lug 4 into slots 6 in the bifur- V on the carriage of a lathe (not shown) in a Well known manner. The slots 6 permit the ends of the pin 5 to work loosely therein so lIlStlOl I ion will be first hereinafter described in connection with the accompanying drnvings, which constitute part of this specification, and then more specifically de; l of the descripof'said-wheels, as is have its end portion finished to provided consisting of irregularities in the lathe, rather or work or both. j The jaw 12 has a recess for as a 9 in its Specification of Letters Patent. Paten ted'M3f; 1"" 1 fi ii cati n fiieg 1:6 am 10,1920. Serial No."357,598.-- V

upper. or inner longitudinal face, and. in this,

recess there are journaled two spacednurlk ing wheels 10, as by the cross pins orshafts 11. The recess may extend totheyend of the jaw 2 and. have the coupling member 1 seat-. ed there1n,- as shown;-; The outer end portion of the jaw 2 may be suitably, finished to serve as a handle 12, as illustrated in'Figt'l on v i said handle may be'dispensed with, if de-. w

l I 7O 7 Another jaw 13 is pivotally connected-to 12 sired, as indicated in Figs. 2 and 3.

the couplingmember 1 by a pivot pin 142m gag ng one of a plurality of spacedholes 15' made with respect to cess 9 in the j a w2, andf'ln sald recess 16a slngle nurllng Wheel; the shaft .18, said wheel -1,7

handle 19- extending; substantially parallel to the handle 12 as'shown'in Fig. handle 19 -may also be dispensed shown in Fig. 2. When thejhandles are provided, they may be: grasped by the hand of the operatorand the necessaryjyielding pres-' sureexerted thereon to, hold the 17, is. j'ournaled, as by); a I being disposed. opposite the mtervening space betweenthe. pairof wheels 10- and overlapping portions usual.) The-jaw 13 may serve aspacoupling member, whereby a :wide range of adjustments .ofthe jaw 13-.n'1ayibe the jaw-2.; The jaw; -13 hasa recess -16-.-in its faceoppositethe re. i

wheels 10 and'l7 i icontact withthe work" 20. In case the strain should-become too: v

greaton theha1 1d,. oth er nieans forr-yieldingly holding thehandles in position to press the nurling wheels against the work is spring arms2l in-' sorted in bores 22 in the handles 12 and 19 and connected at their outer'ends by a link 23. Said links may be made in assorted sizes to allow for various adjustments to accommodate work of different diameters. yielding holding means is especially de signed for use when work of uneven contour, that is elliptical or angular in cross section,

is to be operated upon. Wherecylindrical work is to be'knurled, the jaws may be locked This I firmly together at the desired adjustment by 7 I 85 1, or said WltliiLS V in the end portion of the recess9 and extend- Said" connecting ing-through a passage 260 in the jaw' 13.

jaw 13.

and 3, the yielding pressure on the work may be obtained by interposing a coiled spring 27 be tween the jaw 13 and nut 26. This spring, or the'spring arms 21in the other form of the invention, may also be used for exerting a yielding pressure upon cylindrical work,

-- a air of jaws carrying cooperating'nurling w eels, of means for adjustably connecting, 1

if desired. However, "for the purpose of illustration, a piece of work having fiat surfaces is shown in the drawings.

A. washer 28, having a V-shaped lug 29 to engage in a similarly shaped notch 30 in the upper face of the jaw 13, may be interposed between said jaw and the spring 27 to formia bearing for the latter or for the nut 26. when the spring is not used, as indicated in Fig. 1. It will be noted that a space3l is left between the end of the lug 4.

. and the inner end of the bifurcation in the shank 8, as best shown in Fig. 3, to permit freemovement of said lug. w i

In many cases the exterior of the work to be knurled is roughand should be smoothed down before nurling. This may be done with the present tool by substituting a smooth wheel for each ofthe nurling wheels 10 and 17, or the jaws 2 and 13 may,

be'made wider and provided with broader recesses to hold a smooth wheel and a nurling wheel on each shaft. In Fig; 5'- the modification is shown applied to an upper jaw 32 having a broad recess 33 in which the shaft 34 carries a smooth wheel 35 as well as the nurling wheel 17, said wheels being sepa-f rated by a cross pin 36. in the shaft 34:. The smooth" wheel is designed to precede the nurlingwheel in contacting with the work, so that a rough piece of work 39, Fig.

7 may be first smoothed, as at 37, and then knurled, as at 38, by the same tool.

Having thus described my invention, what 7 bar 24 is screw threaded and carries a thumb nut 26 adapted to be tightened against the upper face of the;

lug for'the purpose specified, and means for Y holding said jaws in, position to press'said wheels into contact with a piece of'work, a I

'2. In a nurling tool, the combination with 3. In a nurling tool, they combination with a pair of jaws, of wheels carried by "said jaws for smoothing a piece of rough work,

and other wheels also carried by said jaws for nurling the work after it has been smoothed. I

4. In a nurling tool, the combination with a pair of jaws, of means carried by said jaws for smoothing apiece of rough work,

and means also carried by said' jawsfor nurling said work after it has been smoothed.

i i 5. In a nurling tool, the combination with. a pair of jaws carrying cooperating wheels,

of a connecting barpivoted-to one jaw and extending through a passage in the other jaw, a nut adjustable on said bar for varying the distance between the jaws, a spring interposed between said nut and jaw foryi'eldingly pressing the wheels into con tact with the'work, and a washer having a lug to engage a notch in'the'adjacent jaw,

said washer being arranged between the spring and jaw.

In testlmony whereof I ha ig ii name to-this specification, I

ALEXANDER DJID Ics. 

